12651321 has 8 divisors (see below), whose sum is σ = 17756320. Its totient is φ = 7990272.

The previous prime is 12651313. The next prime is 12651323. The reversal of 12651321 is 12315621.

12651321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12651321 - 2³ = 12651313 is a prime.

It is a super-3 number, since 3×12651321³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12651323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110920 + ... + 111033.

It is an arithmetic number, because the mean of its divisors is an integer number (2219540).

Almost surely, 2^12651321 is an apocalyptic number.

It is an amenable number.

12651321 is a deficient number, since it is larger than the sum of its proper divisors (5104999).

12651321 is a wasteful number, since it uses less digits than its factorization.

12651321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221975.

The product of its digits is 360, while the sum is 21.

The square root of 12651321 is about 3556.8695506020. The cubic root of 12651321 is about 233.0121810820.

Adding to 12651321 its reverse (12315621), we get a palindrome (24966942).

The spelling of 12651321 in words is "twelve million, six hundred fifty-one thousand, three hundred twenty-one".